EXPERIMENTS AND ANALYSES FOR CARBON FIBER REINFORCED COMPOSITE MULTI-JOINTS OF THE SATELLITE ANTENNA TRUSS
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摘要: 以典型的卫星桁架结构接头为研究对象,利用三维或二维半编织技术和三维有限元分析技术,对碳纤维增强复合材料接头进行了结构设计、试验测试和数值分析。同时对用特殊编织技术制成的复合材料接头进行了拉伸、压缩和弯曲试验,并对实验结果进行有限元分析和处理。结果显示,接头的断裂强度为400MPa,理论预测断裂位置与试验结果吻合。卫星天线桁架接头用复合材料代替某些航天航空材料是可行的。Abstract: Based on 3-D or 2.5-D weaving technique and 3-D FEA, the experiments and numerical analyses have been fulfilled to the structure design for the composite multi-joints of the satellite antenna truss. A basement was set up to manufacture a non-metal multi-joint into reality. The tests of tension,compression and bending were carried out for the composite joints made by weaving technique. Based on the numerical analyses it is confirmed that the intensity of the composite joint reaches about 400 MPa, and the fractural location is in accordance with the experimental results. The replacement of metallic joints by composites is reasonable.
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Key words:
- composite multi-joints /
- numerical analysis /
- fracture strength
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